Which of the following is part of maintaining a secure network?

Building and maintaining a secure network is crucial in ensuring the overall security of sensitive data, such as cardholder information. This option encompasses various practices and processes necessary to protect the network infrastructure from threats and vulnerabilities.

A secure network involves several layers of security measures and policies that protect the data as it travels across the network. This includes configuring firewalls, ensuring proper network segmentation, and regularly updating software to patch vulnerabilities. By focusing on building a secure network, organizations can create a robust foundation that prioritizes both the physical and logical safeguards required to protect against unauthorized access and breaches.

While restricting access to cardholder data, implementing strong encryption, and regular monitoring of network activities are all important components of a comprehensive network security strategy, they fall under the broader umbrella of maintaining a secure network. Each of these practices is valuable, but the act of building and maintaining a secure network captures the overarching responsibility of ensuring that the network infrastructure itself is designed to withstand potential risks and is kept updated and vigilant against emerging threats.